Air vessel for use in connection with the spinning pumps of artificial silk spinningmachines



p 1937. A. BENNETT 2,093,596

AIR VESSEL FOR USE IN CONNECTION WITH THE SPINNING PUMPS .OF ARTIFICIAL SILK SPINNING MACHINES Filed May 11, 1956 INVENTORS A. BENNIETTY Patented Sept. 21, 1937 want AIR VESSEL FOR USE liN CONNECTION WITH THE SPINNING PUMPS or ARTIFICIAL SILK SPINNING MACHINES Arthur Bennett, Sali'ord, England, assignor t Kirklees Limited, Tottington Bury, England Application May 11, 1936, Serial No. 79,089

In Great Britain June 6, 1935 i 2 Claims.

This invention relates to improvements in air vessels which are employed in connection with the spinning pumps of viscose spinning machines. v

The main purpose of such air vessels is to prevent pulsations in the supply of viscose to the jets and they are usually situatedbetween the pumps and the candle filters although they may be arranged on the pump casings or between the candle filters andthe jets.

It is evident that any appreciable change in pressure from the normal in the viscose supply system will result in a tendency for the level of the viscose in the air vessel to rise or fall but with air vessels as at present constructed any rise or fall of the level of the viscose is not easily observed owing to the relatively large cross sectional area of the vessel and consequently the level of the viscose cannot be employed as an indication of the pressure in the system.

As it is very desirable that any variations in pressure from the normal, from whatever cause they may arise, should be immediately apparent since they result in faulty spinning and therefore require correction or adjustment the object oithe present invention is to construct the air vessel so that it can be employed as a readily visible indicator of the pressure in the supply system between thepump and the jet.

According to the invention the air vessel of thick glass or other transparent material is formed with a narrow tubular portion within which the level of the viscose rises and falls and owing to the small cross sectional area thereof any change of pressure in the viscose supply system will immediately be apparent by a corresponding change in position of the level of the viscose therein.

The narrow tubular portion may be graduated to indicate directly the pressure or it may have an upper and lower mark indicating the maximum and minimum limits of pressure for proper working, a rise of the viscose level above such limit indicating a faulty pump, filter or jet and a fall of the viscose level indicating a leakage in the system.

The invention will be'described with reference to theaccompanying drawing in which:-

Fig. 5 is a transverse section on line 55] V Fig. 2.

Fig. 6 is a transverse section on line G Fig. 2.

As will be seen from Fig. 1 the usual air vessel is in the form of a cylindrical vessel A of thick glass with a relatively large cross sectional area which only permits of very slight variations in level of the viscose therein on large variations of pressure.

In contradistinction to such construction the air vessel B which is of thick glass or other transparent material forming the present invention and shown in Figs. 2 to 6 consists of'a narrow tubular portion b opening at the bottom into a tubular portion b of somewhat larger diameter equal to the diameter a at the bottom of the ordinary vessel A (Fig. 1) when the latter is affixed to the bracket connecting the pump to the supply pipe or other part of the supply and terminating at the top in a small chamber b larger in diameter than the portion 1). p

' A scale C indicating pressures may be marked on. the tube 1) or two indicating marks only may be indicated thereon, to indicate the maximum and minimum limits of pressure for safe working.

An air vessel constructed as hereinbefore described indic-ates the maximum pressure which should not be exceeded without the risk of .a decreased fiow of viscose and the spinning of an incorrect denier. Thus, when such maximum pressure is indicated by the rise of the level of the viscose to such danger mark the various spining components 1. e. the pump, candle filter and jet should be examined. .On the other hand should a leak occur in any of the parts this will be indicated on the air vessel by the level of the viscose falling below the minimum pressure indication.

The air vessel will alsoindicate irregular working of the pump pistons in which the viscose level will fluctuate as each piston comes into operation.

An air vessel constructed in accordance with the invention also has the further advantages over an air vessel of ordinary construction:--

Witha vessel of ordinary construction there is the danger of a yarn of either too low or too high a denier being spun when the pump is first put into operation after standing. Should the yarn be picked up from the spinning bath immediately the jet has been placed therein there will be a slow flow due to the quantity of viscose which has to fill up the air vessel to the required pressure before the whole of the pump output passes through the jet. On the other hand, if the pump has reached its full flow before the jet is inserted in the bath a larger volume of viscose is in the vessel than when the jet is in its spinning position for a time it receives viscose from two sources i. e. the pump and the air vessel thus producing a yarn of too high denier.

With an air vessel formed in accordance with the present invention both these disadvantages are largely avoided owing to the much smaller volume of viscose contained in the air vessel which consequently takes less time to fill to the normal level or for any excess of viscose to empty itself therefrom.

What I claim as my invention and desire to protect by Letters Patent is:

1. An air vessel of transparent material employed in connection with the spinning pumps of viscose spinning machines comprising a bottom chamber of a diameter to fit on to the pump, a parallel sided tubular central chamber of smaller diameter than the bottom chamber up which the Viscose will rapidly rise on any undue increase of pressure in the pump and an upper chamber of larger diameter than the intermediate chamber to receive air driven out of the parallel sided central chamber on any rise of level of the viscose in the latter.

2. An air vessel of transparent material employed in connection with the spinning pumps of viscose spinning machines comprising a bottom chamber of a diameter to fit on to the pump, a parallel sided tubular central chamber of smaller diameter than the bottom chamber up which the viscose will rapidly rise on any undue increase of pressure in the pump, an upper chamber of larger diameter than the intermediate chamber to receive air driven out of the parallel sided central chamber on any rise of level of the viscose in the latter and a graduated scale on the central tubular chamber to indicate the pressure of the viscose.

ARTHUR BENNETT. 

